Cylindrospermopsin induces oocyte maturation and disrupts gene expression in zebrafish ovarian follicles.

Autor: Moraes ACN; Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21.941-902, Brazil; Department of Biological Science, University of Calgary, Calgary, AB T2N 1N4, Canada. Electronic address: moraesacn@gmail.com., Fallah HP; Department of Biological Science, University of Calgary, Calgary, AB T2N 1N4, Canada., de Magalhães VF; Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21.941-902, Brazil., Habibi HR; Department of Biological Science, University of Calgary, Calgary, AB T2N 1N4, Canada.
Jazyk: angličtina
Zdroj: Environmental toxicology and pharmacology [Environ Toxicol Pharmacol] 2022 Aug; Vol. 94, pp. 103915. Date of Electronic Publication: 2022 Jun 21.
DOI: 10.1016/j.etap.2022.103915
Abstrakt: There is evidence that cylindrospermopsin (CYN) exerts reproductive toxicity in mice. However, little information is available concerning the toxicity of CYN in nonmammalian vertebrates. Here, we investigated the direct action of CYN on female reproduction by studying germinal vesicle breakdown, transcript abundance, caspase-3 activity, and testosterone production using cultured follicle-enclosed zebrafish oocytes as a model system. Treatment of follicles with 1,000 μg/L CYN significantly increased GVBD, Caspase-3 activity, and hCG-induced testosterone secretion. Exposure to CYN also reduced the abundance of 3βhsd as well as hCG-induced fshr and era transcripts and increased cyp19a1 mRNA levels. In summary, this study provides a framework for a better understanding of the adverse action of CYN on female reproduction in zebrafish and other vertebrate species. The findings are also relevant to developing valid biomarkers for CYN by measuring zebrafish oocyte maturation and gene expression.
(Copyright © 2022 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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